Just to expand on that a bit, the best thing for the WBC is to have the best players playing. Especially the ones who actually want to participate.
Machado could represent the US, who already would have two other third basemen to possibly choose from in Bryant and Arenado. He starts for the DR team, making them better, allowing one of those two to represent the US, making the event better overall.
Was just thinking that. Manny wouldn't make the team at 3B behind Bryant, Arenado, Donaldson.
You could play him at SS. But we have seen his defense lack a little there though. In an event like this fundamentally sound teams prevail, and I'd probably sacrifice some power and out Brandon Crawford at SS. Addison Russell is a bit raw still, but the WS wasn't too big a stage for him. Would add him too.